Portable monitor



FIG. 1 is a front perspective view of a portable monitor showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is another front perspective view of the portable monitor of FIGS. 1-7 shown in an open configuration of use; and,

FIG. 9 is another perspective view of the portable monitor of FIGS. 1-8 shown in another open configuration of use.

Broken lines in the drawings depict portions of the portable monitor that form no part of the claimed design. 

CLAIM The ornamental design for a portable monitor, as shown and described. 